IEEE Standards Association
IEEE STANDARD
C57.12.20-2005 - IEEE Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller: High Voltage, 34500 Volts and Below; Low Voltage, 7970/13800Y Volts and Below
Description: This standard covers certain electrical, dimensional, and mechanical characteristics and safety features of singleand three-phase, 60 Hz, mineral-oil-immersed, self-cooled, overhead-type distribution transformers 500 kVA and smaller, high voltages 34 500 V and below and low voltages 7970/13 800Y V and below.
- Status:
Oversight Committee: PE/TR - Transformers 
Sponsor: IEEE Power & Energy Society
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